'1/RRATA. 
/ 
Page 40, line 9, for 49,009,000, read 40,000,000,000. 
“ 71, “ 27, column T’rsof Obi., for 114, read 14. 
“ 71, “ 23, “ “ “ for 8, read 18. 
“ 71, “ 16, for 4,000,000, read 40,090,000. 
“ 107, “ — 3, for Fohiated, read Foliated. 
“ 122, “ 13, for ieda, read idea. 
“ 128, lines 7 and 8, strike out “ in the vertical and overhanging cliffs on the Turn- 
pike, just below Blowing Rock, in Caldwell,” and insert at line 21, page 137, after Bine Rirtye. 
Page 127, line 13, for Chorite, read Chlorite. 
“ 130, “ 16, for n, read In. 
“ 133, “ — 5, for hydra- read hydro- 
“ 146, “ — 8, for Triossie, read Tri assic. 
“ 159, top, for p. 195, read 159. 
“ 189, line 22, for glauconite, read glauconite. 
“ 217, line 26, for section II, read section III. 
“ 250, line 6, for Spanishred, read Spanish red. 
“ 293, line 20, for section III, read section IY. 
Appendix, page 14, line 2, for Exoyra, read Exogyra. 
Appendix, page 24, line 18 from bottom, strike out is, after ostrea sellasformis. 
Appendix, page 27, heading Callieardia, add Cardium Bechei, Adams and Reeve. 
Appendix, page 105, line 3 from bottom, for moles, read makes. 
In the map, at the beginning, there is an obvious blunder in the marking and coloration of 
the section, Hiwassee to Catawbi, at the junction of the Iluronian and Laurentiau. 
Professor Conrai wishes to add the following note to appendix A : 
“ I have inadverten ly given precedence to the name Busycon, quoting Sycotypus as a 
^ubgenus of the same, but the latter has priority of date, and should stand for the genus 
while Busycon represents the subgenus Two well defined groups are met with in this genus, 
which, culminating in the Miocene, contains no doubtful species as to which section it appe r 
tains ; Busycon being always without a channel about the suture, and when armed, it is always 
with spines ; whereas, the subgenus Sycotypus, has invariably a channel and tubercles in place 
of spines. Such a marked differ nee between the two sections might constitute two genera, 
but the arrangement in genus and subgenus is quite as convenient, leaving the generic questio 
to be solved by the anatomist.” 
35 
